Patents by Inventor David Vaughan Watkins

David Vaughan Watkins has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Electrical control device
    Patent number: 4075568
    Abstract: A continuously variable control device, e.g. a volume control in an amplifier, is so designed that after being set to a desired condition by means of the user's finger it reverts to its normal (unset) condition, means being provided to memorize or store the position to which the control was set.
    Type: Grant
    Filed: February 18, 1976
    Date of Patent: February 21, 1978
    Assignee: Fidelity Radio Limited
    Inventor: David Vaughan Watkins